CVE-2026-14672

Medium5.3Published on August 13, 2026

Observable response discrepancy in PostgreSQL SCRAM authentication allows an unauthenticated user to test the existence of a user via observing the SCRAM iteration count. This requires the probed user to have a non-default scram_iterations count, because the authentication challenge for a nonexistent user reports the default scram_iterations. Within major versions 16-18, minor versions before PostgreSQL 18.6, 17.11, and 16.15 are affected. Versions before PostgreSQL 16 are unaffected.

CVSS score5.3 / 10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness type (CWE)CWE-204

Vendorspostgresql

Affected products

Vendors	Product	Versions
postgresql	postgresql	< 14.24

Vulnerabilities

PostgreSQL Logical Decoding Flaw Allows Code Execution as the `postgres` User

PostgreSQL CVE-2026-6471 lets REPLICATION users load arbitrary libraries via logical decoding to execute code as postgres. See affected versions and fix.

Sep 6, 202601:146 min readRead

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CVE database

Affected products

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PostgreSQL Logical Decoding Flaw Allows Code Execution as the `postgres` User